Task 13

1 D

2 C

Task 14

1 - B

2 - D

Task 15

1 B

Task 21

1 A với C giống

2 A

Task 22

1 Van Gogh’s paintings arre almost as expensive as the work of Picasso

2 We didn't known the Recycled Orchestra until we watched the video online yesterday

1. B

2. C

b c

 1B

2C

1,B

2,D

3,D

4,A

1,B

2,A

3,C

4,D

Task 15

1 B

2 D

3 A

4 A

Task 16

1 B

2 A

3 C

4 D

b d a a b a c d

1A(adj)

2D(n)

3A(adj)

4C(n)

5D(adj)

6C(adj)

7B(n)(Tham khảo c7)

8A(n)

9C(n)

10B(v)

11A(adv)

1 Mrs Brown reproached her son for playing computer games all day

2 He had hardly approached the house when the policemen stopped him

3 Only after they came back did they discover that the picture had been stolen

4 He hasn’t had his eyes tested for ten months

5 He studied so badly that he couldn’t pass his exam

6 Such was the demand that they had to reprint the book immediately

7 But for taking my advice, they wouldn’t have got success

8 Nowhere will you find a more dedicated worker than Mr. John

9 They left early so that they could avoid the traffic

10 Jennifer wished she hadn’t behaved foolishly

3.

Pt hoành độ giao điểm:

\(-x=x^3\Rightarrow x\left(x^2+1\right)=0\Rightarrow x=0\)

Pt có 1 nghiệm nên 2 đồ thị cắt nhau tại 1 điểm

4.

\(2^{2x^2-7x+5}=2^5\Rightarrow2x^2-7x+5=5\)

\(\Rightarrow\left[{}\begin{matrix}x=0\\x=\dfrac{7}{2}\end{matrix}\right.\) \(\Rightarrow x_1+4x_2=14\)

5.

\(B=10a.a^2\sqrt{5}=10\sqrt{5}a^3\)

6.

\(B=\dfrac{1}{3}\pi R^2h\)

7.

Hàm bậc nhất trên bậc nhất nên đơn điệu trên đoạn đã cho

\(\Rightarrow\) min, max rơi vào 2 đầu mút

\(\Rightarrow M.m=y\left(-5\right).y\left(-2\right)=\dfrac{4}{55}\)

8.

\(lnx=-1\Rightarrow x=e^{-1}\)

Pt có 1 nghiệm

9.

Hàm \(y=\left(\dfrac{1}{2}\right)^x\) nghịch biến trên R 

10.

\(\log x\ge1\Rightarrow x\ge10\)

D đúng

1 A

2 D

3 A

4 B

5 B

6 C

7 C

8 A

9 D

10 B

11 D

12 A

13 A

14 D

15 A